JP2007230396A - Airbag and airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag improved in performance for protecting side parts of the head by enlarging a head part protection range, in regard to an airbag to be inflated for expansion toward a position over the head of an occupant. <P>SOLUTION: The airbag 11 is provided with a first panel 35A arranged on an occupant side and a second panel 35B arranged on a side opposite to the occupant, and formed by connecting the first and the second panels 35A and 35B to each other. The airbag 11 has a first chamber 42 structured between the connected first and the second panels 35A and 35B and provided upstream in the flowing direction of the gas to be supplied from an inflater 13, and second chambers 43 and 43 structured between a first bag 11A having side parts 11S and 11S to be inflated for expansion toward sides of the head 2A of the occupant and the connected first and the second panels 35A and 35B and provided downstream in the flowing direction of the gas to be supplied from the inflater 13. The airbag 11 is also provided with second bags 11B and 11B to be inflated for expansion toward positions over the head 2A of the occupant 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag and an airbag apparatus that are installed in a vehicle such as an automobile.

  Conventionally, for example, in a driver's seat, a driver's seat airbag device that is inflated and deployed from the center of rotation of the steering wheel to the driver side, a passenger seat airbag that is inflated and deployed from the instrument panel to the passenger seat side, etc. Various airbag devices for restraining the occupant's body are used.

  In recent years, in the event of a major accident in which a large external force is applied to the vehicle, such as a vehicle body rollover due to a collision or a fall of a heavy object such as a fallen tree, there is a possibility that an impact may be applied from the overhead of the occupant to the head. Therefore, an air bag for coping with such a case has already been proposed (see, for example, Patent Document 1).

JP 2002-37011 A

  In the above prior art, an airbag composed of a bag body combined with a base fabric is accommodated in a backrest (or headrest) of a vehicle seat, and inflated by supplying pressure fluid from an inflator to the airbag in an emergency. And a basic configuration for deploying above the head of the passenger is disclosed.

  An object of the present invention is to provide an airbag that can expand the head protection range and improve the side protection performance of the head in an airbag that inflates and deploys above the head of the occupant.

  In order to achieve the above object, according to a first aspect of the present invention, an airbag that inflates and deploys above an occupant's head includes a side portion that inflates and deploys toward the occupant's head.

  In the first invention of this application, since the side portion that inflates and deploys toward the occupant's head side is provided, movement of the occupant's head to the side can be restricted. As a result, when the vehicle collides (including a side collision) or rolls over, the burden on the passenger's head (especially the burden on the side) can be suppressed. Side protection performance can be improved.

  The second invention is an airbag comprising a first panel disposed on the occupant side and a second panel disposed on the opposite side of the occupant, and combining the first and second panels. A first chamber provided between the joined first panel and the second panel and provided upstream in the flow direction of the pressure fluid supplied from the inflator, to the side of the head of the occupant A first bag having a side part that expands and deploys; and a second chamber provided between the joined first panel and the second panel and provided downstream in the flow direction of the pressure fluid supplied from the inflator And a second bag that is inflated and deployed above the head of the occupant.

  In the second invention of the present application, when the pressure fluid is supplied from the inflator to the airbag, first, the first bag having the first chamber provided on the upstream side in the flow direction of the pressure fluid is inflated and deployed. At this time, the side portion of the first bag is inflated and deployed toward the side of the occupant's head. Thereafter, a second bag having a second chamber provided on the downstream side in the flow direction of the pressure fluid is inflated and deployed above the head of the occupant. Thereby, while the movement to the upper direction of a passenger | crew's head is controlled by a 2nd bag, the movement to the side of a passenger | crew's head can also be controlled by the side part of a 1st bag. As a result, when the vehicle collides (including side collisions) or rolls over, the burden on the passenger's head (especially the burden on the side) can be suppressed. Side protection performance can be improved.

  According to a third invention, in the first or second invention, the side portion includes a first side portion that inflates and deploys to one side of the head of the occupant when the airbag is inflated and deployed, and the occupant's head It is comprised from the 2nd side part which expand | swells and expands to the other side of this.

  In the third invention of the present application, when the first bag is inflated and deployed, the first side portion is inflated and deployed to one side (for example, the right side) of the occupant's head, and the second side portion is the other side of the occupant's head ( For example, it expands and expands to the left). As a result, the movement of the occupant's head to one side and the other side (both left and right) can be restricted, further reducing the occupant's head burden (especially the side burden) and protecting the head. It is possible to widen the range and further improve the side protection performance of the head.

  According to a fourth aspect, in the third aspect, the first side portion and the second side portion each have a size capable of covering a side of the head of the occupant.

  Thus, when the vehicle collides (including a side collision) or rolls over, the side of the occupant's head is covered from both sides by the first side and the second side, and the side of the head Can be restricted, so that the burden on the passenger's head (especially the burden on the side) can be further suppressed, the head protection range can be widened, and the side protection performance of the head can be further improved. .

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the side portion is a deployment derivation for deriving the second bag above the head of the occupant when the first bag is inflated and deployed. It has the part.

  In the fifth invention of the present application, when the first bag is inflated and deployed, the second bag is led out above the head of the occupant by the deployment lead-out portion of the side portion of the first bag. Thereby, since the 2nd bag can be beforehand led out to a crew member's head and the 2nd bag derived after that can be inflated, the developability of an air bag can be improved.

  In order to achieve the above object, a sixth invention comprises the airbag according to any one of the first to fifth inventions, and an inflator for supplying pressure fluid for inflating and deploying the airbag. It is characterized by having.

  ADVANTAGE OF THE INVENTION According to this invention, in the airbag which inflate-deploys above a passenger | crew's head, a head protection range can be expanded and the side part protection performance of a head can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic side view of an automobile seat 1 equipped with an air bag according to an embodiment of the present invention. FIG. 1 (a) shows a normal state, and FIG. 1 (b) shows an air bag when inflated. ing. In FIG. 1, an occupant 2 is seated on a seat 1. The seat 1 has a seat portion 1A, and a backrest portion 1B protrudes upward from the seat portion 1A. A headrest 1C is attached to the top of the backrest 1B.

  The seat 1 is equipped with an airbag device 10 in the backrest 1B for restraining the head 2A of the occupant 2 when the vehicle rolls over due to an accident. The airbag device 10 is composed of a bag body 35 (see FIG. 5) in which a first panel 35A and a second panel 35B (see FIG. 5) are sewn together, and is deployed above the head 2A of the occupant 2 when inflated. The air bag 11 provided in this manner, the retainer 12 accommodated in a state where the air bag 11 is folded, and the inflator 13 for supplying gas (pressure fluid) for inflating and deploying the air bag 11 (FIG. 2, 3). Further, the seat 1 includes a seat frame 14 that includes a side plate 14A (see FIG. 2), a cross member 14B (see FIG. 2), and the like and forms a skeleton of the seat 1, and the retainer 12 and the inflator. 13 is provided on the seat frame 14 (details will be described later).

  In addition, although not shown in the figure, in the automobile on which the airbag device 10 is mounted, when the automobile collides (including a side collision or the like) or rolls over, the occurrence (or prediction of the occurrence) is detected. Various sensors are provided. Then, an inflator control circuit (not shown) activates an initiator (not shown) of the inflator 13 based on detection signals from these sensors.

  As shown in FIG. 1A, the airbag 11 is stored in a folded state in the retainer 12 at normal times. On the other hand, for example, when the vehicle rolls over, the inflator 13 of the airbag device 10 is ignited by the inflator control circuit (not shown), and the airbag 11 is inflated as shown in FIG. It expands between the roof 3 of the automobile and the head 2A of the occupant 2 and on both sides of the head 2A (parts indicated by 11S).

  In the case of an automobile such as an open car without the roof 3, the airbag 11 is deployed above the head of the occupant 2 and on both sides.

  FIG. 2 is a perspective view showing a structure for fixing the airbag device 10 to the seat frame 14, and FIG. 3 is an exploded perspective view of the airbag device 10 showing the fixing structure in more detail.

  2 and 3, the seat frame 14 includes a pair of side plates 14A and 14A provided on both sides in the vehicle width direction (both sides in the left-right direction in FIG. 2) in the back portion 1B of the seat 1, and these side plates. A cross member 14B is provided between 14A and 14A so as to extend substantially along the vehicle width direction and to connect the side plates 14A and 14A. The side plates 14A and 14A and the cross member 14B are both provided in the backrest portion 1B of the seat 1. Although not particularly illustrated, the seat frame 14 also has a base plate provided in the seat portion 1A.

  A gas supply port 11a connected to the inflator 13 via the pipe member 20 on the base end side (the inflator side, the lower side in FIG. 3) of the airbag 11, and mounting pieces located on both sides of the gas supply port 11a 11b, 11b. Two bolt holes 22 through which mounting bolts 21a for fixing the airbag 11 and the retainer 12 are inserted are formed in the mounting pieces 11b and 11b. On the other hand, the retainer 12 is provided with attachment portions 12a and 12b in which bolt holes 24 through which attachment bolts 23 for fixing the retainer 12 are inserted are provided on both sides in the vehicle width direction. The lower side in FIG. 3 is provided with a mounting portion 12c having a bolt hole 25 similarly formed at a position corresponding to the bolt hole 22 of the airbag mounting portion 11b.

  A plurality (four in this embodiment) of the mounting bolts 21a are formed on the bolt holes 25 formed in the retainer mounting portion 12c and the airbag mounting portion 11b in a state where the airbag 11 is folded and stored in the retainer 12. The bolt hole 22 and the mounting plate 26 are respectively inserted into bolt holes 27 formed at positions corresponding to the bolt holes 22 of the airbag mounting portion 11b, and fastened to the nut 21b. Thereby, the airbag 11 is fixed to the retainer 12 in the folded state. A plurality (two in this embodiment) of the mounting bolts 23 are inserted into the bolt holes 24 of the retainer mounting portions 12a and 12b, and then fastened to fastening holes (not shown) provided in the cross member 14B. Thereby, the retainer 12 accommodated in the state in which the airbag 11 is folded is fixed to the cross member 14B.

  The pipe member 20 is, for example, a metal pipe bent at a plurality of locations (two locations in the present embodiment), and is provided below the retainer 12. The pipe member 20 and the airbag 11 are connected by covering the bag side end 20a of the pipe member 20 with the gas supply port 11a of the airbag 11 and, for example, by caulking and fixing with a metal clamp band 30. Yes. In addition, the pipe member 20 and the inflator 13 are connected by connecting and bonding (or welding or the like) the connecting portion 20b provided at the end portion on the inflator side of the pipe member 20 to the upper end portion 13a of the inflator 13. Yes. In this way, the airbag 11 and the inflator 13 are connected via the pipe member 20.

  The inflator 13 is provided further below the pipe member 20, and is attached to the side plate 14 </ b> A on one side (the right side in the vehicle width direction in the present embodiment) by an attachment member 31. The mounting member 31 includes a pair of mounting plates 31A and 31B that sandwich and support the inflator 13, and these mounting plates 31A and 31B are a plurality (four in this embodiment) formed on the mounting plate 31A. The rivet 31a is inserted and inserted into a plurality of (four in this embodiment) rivet holes 31b drilled at corresponding positions on the mounting plate 31B, and is fixed with the inflator 13 therebetween. An attachment portion 31c formed by bending approximately 90 degrees is provided at one end (right side in the vehicle width direction) of the attachment plate 31A, and a plurality of (two in this embodiment) attachment bolts 32 are provided. The attachment member 31 is fixed to the side plate 14A by being inserted into the bolt holes 33 formed in the attachment portion 31c and fastened to fastening holes (not shown) provided in the side plate 14A. As a result, the inflator 13 is fixed to the side plate 14 </ b> A via the attachment member 31.

  One end of the connector 34 connected to the inflator 13 is pulled out of the airbag device 10 and connected to the above-described inflator control circuit (not shown). In addition, although not shown in the drawings, when a vehicle on which the airbag device 10 is mounted is detected (or predicted to occur) when the vehicle collides (including a side collision) or rolls over. Various sensors are provided. The inflator control circuit activates the initiator of the inflator 13 based on detection signals from these sensors.

  FIG. 4 is a perspective view showing the entire structure of the airbag 11 in the middle of inflation and deployment (a state inflated to the first bag).

  In FIG. 4, the airbag 11 includes a first bag 11 </ b> A having a first chamber 42 (described later) provided on the upstream side in the flow direction of gas supplied from the inflator 13, and gas supplied from the inflator 13. The second chambers 43 (described later) provided on the downstream side in the flow direction of the first bag 11A are respectively disposed inside and disposed on the opposite side (vehicle rear side, left side in the figure) of the first bag 11A to expand and deploy. Accordingly, the head 2A of the occupant 2 is pushed forward and bent forward, and a pair of second bags 11B and 11B that restrain the occupant 2 from moving upward in the head 2A are provided. The first bag 11A and the second bags 11B and 11B are connected to each other by communication portions 11C and 11C each having a communication passage 44 (described later).

  Here, the upstream side and the downstream side refer to the first bag 42 in the first bag 11A from the inflator 13 through the gas supply port 11a, and then the second bag 11B through the communication passages 44 and 44. , 11B indicates the upstream side and the downstream side of the communication passage 44 in the flow direction of the gas flowing into the second chambers 43, 43 (see FIG. 5 described later).

  The second bag 11B is formed in a long shape so that one end in the longitudinal direction (the upper side in FIG. 4) is positioned above the head 2A of the occupant 2 when inflated and deployed. The second bag 11B is connected to the other longitudinal side (the lower side in FIG. 4). Further, the gas supply port 11a described above is provided in the lower portion of the first bag 11A, and the gas ejected from the inflator 13 passes through the pipe member 20 and the gas supply port 11a and the first bag 11A in the first bag 11A. It is supplied to the second chambers 43 and 43 in the second bags 11B and 11B through the chamber 42 and the communication passages 44 and 44 in the communication portions 11C and 11C. FIG. 4 shows a state in which the gas supplied from the inflator 13 flows into the first chamber 42 and the airbag 11 is expanded to the first bag 11A.

  On the left and right sides (both sides in the vehicle width direction) of the first bag 11A, substantially rectangular side portions 11S and 11S (first side portion and second side portion) having the deployment lead-out portions 50 and 50 protrude. Is provided. Each of the side portions 11S and 11S has a size capable of covering the side of the occupant's head 2A (see FIG. 1B). The unfolding parts 50 and 50 and the edge parts (parts) of the second bags 11B and 11B are joined by sewing (shown as a sewing joint part 51 in FIG. 4). The second bags 11B and 11B are joined to each other by sewing at a substantially central portion in the width direction of the airbag 11 (shown as a sewing joint portion 52 in FIG. 4). With such a configuration, when the first bag 11A is inflated and deployed, the side portions 11S and 11S are deployed to the side of the head portion 2A, and the deployment lead-out portions 50 and 50 of the side portions 11S and 11S The two bags 11B and 11B are led out above the head 2A of the occupant 2 (the state shown in FIG. 4), and then the gas from the inflator 13 passes through the communication passages 44 and 44 in the communication portions 11C and 11C. 11B and 11B are supplied to the second chambers 43 and 43, and the second bags 11B and 11B are inflated, respectively.

  The airbag 11 including the first bag 11A and the second bag 11B has a first panel 35A disposed on the occupant 2 side (vehicle front side) and a first panel 35A disposed on the opposite side (vehicle rear side). A single bag 35 is formed by sewing and joining the two panels 35B.

  FIG. 5 is a first view showing the overall structure of the bag body 35 before it is folded (before the first bag 11A is placed in front of the second bag 11B by bending the communication portion 11C as shown in FIG. 4). It is the top view seen from the 2 panel 35B side. In addition, since the bag body 35 is substantially left-right symmetric, description of the left half is abbreviate | omitted.

  As shown in FIG. 5, the bag body 35 includes a first panel 35 </ b> A and a second panel 35 </ b> B (only the second panel 35 </ b> B shown in FIG. 5) having substantially the same shape as the gas supply port 11 a portion. It is formed as one bag body by sewing and joining over the entire circumference. In the figure, reference numeral 40 denotes the sewing joint portion, and reference numeral 41 denotes a sealing material portion made of an appropriate sealing material provided along the sewing joint portion 40 for sealing the sewing joint portion 40.

The second panel 35B includes a first bag portion 35B1 having a substantially trapezoidal shape that expands from the gas supply port 11a side (lower side in the drawing) toward the opposite side (upper side in the drawing), and the first bag portion. It has a pair of second bag portions 35B2 and 35B2 provided on one side (right side in the figure) and the other side (left side in the figure, but not shown) of 35B1. The first panel 35A has substantially the same shape as the second panel 35B. The first panel 35A and the second panel 35B having such a shape are sewn and joined over the entire circumference except for the gas supply port 11a portion as described above, whereby the first panel 35A and the second panel 35B are connected. Between the first chamber 42, a pair of second chambers 43, 43 disposed on one side (right side in the figure) and the other side (left side in the figure) of the first chamber 42, the first chamber 42 Communication passages 44 and 44 communicating with the second chambers 43 and 43 are formed. As a result, the first chamber 42, the second chambers 43, 43, and the communication passages 44, 44 are enveloped by the continuous sewing joint 40 and the seal member 41, as a whole. Are arranged as follows.

  The first chamber 42 includes a sewing coupling portion 40a provided substantially along the gas inflow direction at a substantially central portion thereof, and a sewing coupling portion 40b provided on both sides (left and right sides in the drawing) of the sewing coupling portion 40a, There are four chamber chamber portions 42a, 42b, 42c, 42d (not shown) formed by 40b. Thereby, the gas supplied from the gas supply port 11a can be smoothly introduced toward the downstream side (upper side in the drawing) of the first chamber 42.

  As described above, the left and right sides (the left and right sides in FIG. 5) of the first bag 11A are provided with the side portions 11S and 11S having the deployment lead-out portions 50 and 50, respectively. Of the chamber chamber portions 42a, 42b, 42c, 42d constituting the first chamber 42, part of 42a, 42d located on the left and right sides is formed in the side portions 11S, 11S having the unfolding portions 50, 50. Has been.

  The bag body 35 having the above-described structure is sewn on the outer edge portion along the sewing coupling portion 40 in a state where the first panel 35A and the second panel 35B are overlapped, and the sewing coupling portion of the first chamber 42 portion. 40a, 40b, 40c, 40d, 40e, etc., and then the second bags 11B, 11B on both sides are opposite to the occupant 2 with respect to the first bag 11A as shown in FIG. In order to bend the communicating portions 11C and 11C along the fold line X so as to be positioned at the position of the second bag 11B and 11B, the protruding pieces 53 and 53 and the protruding pieces 54 and 54 are respectively connected to each other. The edge portion 55 is sewn so as to match (see the sewing coupling portion 52 in FIG. 4), and then the edge portions 56 and 56 of the deployment lead-out portions 50 and 50 of the first bag 11A and the second bag 1 are further combined. The edge portions 57 and 57 of B and 11B are sewn so that the protruding pieces 58 and 58 and the protruding pieces 59 and 59 are aligned with each other (see the sewing connecting portion 51 in FIG. 4), and the second bags 11B and 11B are The first bag 11A is manufactured by being fixed in a state of being arranged on the rear side. When the airbag 11 is attached to the retainer 12, the airbag 11 is folded and stored in the retainer 12. At this time, the mounting bolt 21a is inserted into the bolt holes 22 and 22 of the mounting pieces 11b and 11b provided on the base end side (lower side in FIG. 5) of the first bag 11A.

  In the airbag apparatus 10 configured as described above, in an emergency such as a vehicle collision, the sensor detects this, and an activation signal is input from the inflator control circuit to the initiator of the inflator 13 to activate the initiator. 13 is actuated to inflate and inflate the airbag 11 toward the occupant 2 side, and the side portions 11S and 11S of the airbag 11 are located on both sides of the head 2A of the occupant 2 Inflates and expands.

  According to the airbag 11 of the present embodiment that performs the configuration and operation described above, the following effects are obtained.

  That is, in the airbag device 10 of the present embodiment, as described above, when gas is supplied from the inflator 13 to the airbag 11, the gas first flows into the first chamber 42 provided upstream in the gas flow direction. Thus, the first bag 11A is inflated and deployed, and the side portions 11S and 11S of the first bag 11A are inflated and deployed to the side of the head 2A of the occupant 2. Thereafter, the gas flows into the second chambers 43, 43 provided on the downstream side in the gas flow direction, and the second bags 11B, 11B are inflated and deployed above the head 2A of the occupant 2. As a result, the upward movement of the occupant head 2A is restricted by the second bags 11B and 11B, and the lateral movement of the occupant head is also restricted by the side portions 11S and 11S of the first bag 11A. it can. As a result, when the vehicle collides (including a side collision) or rolls over, the burden on the occupant head 2A (especially the burden on the side) can be suppressed. The side protection performance can be improved.

  In the present embodiment, side portions 11S and 11S are provided on both the left and right sides of the first bag 11A. When the first bag 11A is inflated and deployed, the one side portion 11S is inflated and deployed to one side (for example, the right side) of the occupant head 2A, and the other side portion 11S is the other side of the occupant head 2A ( For example, it expands and expands to the left). As a result, movement of the occupant head 2A to one side and the other side of the occupant head 2A (both left and right) can be restricted, so that the burden on the occupant head 2A (particularly the side burden) can be further suppressed. The protection range can be widened, and the head side protection performance can be further improved.

  In the present embodiment, in particular, the side portions 11S and 11S each have a size capable of covering the side of the occupant head 2A. Thus, when the vehicle collides (including a side collision) or rolls over, the sides 11S, 11S cover the side of the occupant's head 2A from both sides, and the side of the head 2A Since the movement can be restricted, the burden on the occupant head 2A (particularly the burden on the side) can be further suppressed, the head protection range can be widened, and the side protection performance of the head can be further improved.

  In the present embodiment, in particular, the side portions 11S, 11S provided on the left and right sides (both sides in the vehicle width direction) of the first bag 11A allow the second bag 11B, 11B to be attached to the head of the occupant 2 when the first bag 11A is inflated and deployed. It is set as the structure which each has the expansion | deployment derivation | leading-out parts 50 and 50 for making it derive | lead-out above 2A. As a result, the second bags 11B and 11B can be led out in advance above the head 2A of the occupant 2 and then the second bags 11B and 11B thus derived can be inflated. Can be improved.

  In the above-described embodiment, the second bags 11B and 11B have substantially the same shape and are joined to each other by sewing at a substantially central portion in the width direction of the airbag 11. However, the present invention is not limited to this. That is, for example, the second bags 11B and 11B may be configured to have different widths, and the second bags 11B and 11B may be coupled at a position deviated from a substantially central portion in the width direction of the airbag 11. The coupling position at this time is preferably a position different from the sewing coupling portions 40a and 40b of the first bag 11A. Thereby, the site | part where the thickness of an airbag becomes thin in a vehicle width direction can be decreased.

  In the above-described embodiment, as described above, the airbag 11 (bag body 35) is configured by sewing and coupling the first panel 35A and the second panel 35B. The airbag 11 (bag body 35) may be configured by connecting the first panel 35A and the second panel 35B by other connecting means such as bag weaving.

1 is a schematic side view of an automobile seat provided with an embodiment of an airbag device of the present invention. It is a perspective view showing the fixation structure to the seat frame of one Embodiment of the airbag apparatus of this invention. It is a disassembled perspective view of the airbag apparatus showing the fixing structure shown in FIG. 2 in detail. It is a perspective view showing the whole structure of the airbag in the middle of inflation deployment. It is the top view seen from the 2nd panel side showing the whole structure of a bag.

Explanation of symbols

2 Occupant 10 Airbag Device 11 Airbag 11A First Bag 11B Second Bag 11S Side (first side, second side)
13 Inflator 35A 1st panel 35B 2nd panel 40 Sewing joint part 41 Sealing material part 42 1st chamber 43 2nd chamber 44 Communication path 50 Unfolding | leading-out part

Claims (6)

  An airbag that inflates and deploys above an occupant's head, wherein the airbag includes a side portion that inflates and deploys toward the occupant's head. An airbag comprising a first panel disposed on the occupant side and a second panel disposed on the opposite side of the occupant, the first and second panels being joined together,
A first chamber is provided between the joined first panel and the second panel and provided upstream in the flow direction of the pressure fluid supplied from the inflator, and expands to the side of the head of the occupant A first bag having side portions for deployment;
A second chamber is provided between the joined first panel and the second panel and provided downstream in the flow direction of the pressure fluid supplied from the inflator, and expands above the head of the occupant An airbag comprising: a second bag that is deployed. In the airbag according to claim 1 or 2,
The side portion includes a first side portion that is inflated and deployed on one side of the occupant's head and a second side portion that is inflated and deployed on the other side of the occupant's head when the airbag is inflated and deployed. An airbag characterized by having The airbag according to claim 3,
The airbag according to claim 1, wherein the first side portion and the second side portion each have a size capable of covering a side of the head of the occupant. The airbag according to any one of claims 2 to 4,
The airbag according to claim 1, wherein the side portion includes a deployment lead-out portion for leading the second bag to a position above the head of the occupant when the first bag is inflated and deployed. The airbag according to any one of claims 1 to 5,
An airbag device comprising an inflator for supplying a pressure fluid for inflating and deploying the airbag.

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